CVE-2026-90405
Description
In the Linux kernel, the following vulnerability has been resolved:
media: stm32: dcmi: fix some error handling bugs in probe()
There are a few issues here:
1) After we assign:
chan = dma_request_chan(&pdev->dev, 'tx');
Then the error paths need to clean up before returning. The first
error path does a direct return.
2) The error paths check 'dcmi->mdma_chan' but that is not assigned
until later so it results in memory leaks. Test 'mdma_chan'
instead.
3) The error handling calls dma_release_channel(dcmi->dma_chan) before
'dcmi->dma_chan' has been assigned which leads to a NULL pointer
dereference. Use the 'chan' variable instead.
I also moved the call to dma_release_channel() after the call to
dma_release_channel() so it mirrors the allocation code better.